Getting your product data into an app's cart drawer
Steadyrack sell wall-mounted bike racks, and which rack you want depends on which bike you own. That is clear on the product page. In the cart it disappeared, so a customer with two different racks in their cart had nothing telling them which was which. They wanted the bike types shown on every cart line, across all three of their regional stores.
The complication is that the cart drawer is rendered by a third-party cart app, not by the theme. Editing the theme’s cart code changes nothing, because that code never runs. And the app’s own content blocks sit at fixed positions in the drawer, global and static, with no way to render anything per line.
What we did
We treated it as a data problem rather than a cart problem. The bike types were already in the store, in a product metafield the product page reads. So the theme now publishes that data to the page as a small map of variant to bike types, and a short script drops the right line onto each row of the drawer as it renders. Nothing is hard-coded. Every size of rack is its own variant with its own list, so a cart holding a narrow and a wide rack shows the correct list against each one. The team edit the wording in the admin, the same field that feeds the product page.
The result
Live on all three stores, with the cart drawer app’s own features untouched. When the lists change, that is a metafield edit, not a code change.
What to take from it
When an app owns part of your storefront, you have not lost the data, only the template. Keep the content in a field you control in the admin, and there is usually a way to surface it, with one place to edit it when it changes. The version to avoid is the one where the wording gets typed into a script, because that is the version that goes stale and nobody can fix it without you.
